© 1989 British Society for Rheumatology
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SULPHASALAZINE THERAPY IN ANKYLOSING SPONDYLITIS: ITS EFFECT ON DISEASE ACTIVITY, IMMUNOGLOBULIN A AND THE COMPLEX IMMUNOGLOBULIN A-ALPHA-1-ANTITRYPSIN


*Staffordshire Rheumatology Centre, Haywood Hospital Burslem, Stoke-on-Trent ST6 TAG, UK
Rheumatology and Allergy Research Unit, Department of Immunology, University of Birmingham Birmingham B15 2TJ, UK
Correspondence to:
1Correspondence to Dr. Davis.
Serum levels of immunoglobulin A (IgA) and the complex immunoglobulin A-
, antitrypsin (IgA-
1 AT) were measured at the commencement and after 3 months of a double-blind, placebo-controlled trial of sulphasalazine (SAS) in patients with active ankylosing spondylitis (AS). Twenty-eight patients were evaluated, 15 on sulphasalazine, 13 on placebo. Significant falls were seen in both IgA (p<0.01) and IgA-
1AT (p<0.001) in the actively treated patients. In addition, significant improvement in clinical and laboratory measures of disease were observed. It is concluded that SAS is effective in AS and modulates the immune response.
KEY WORDS: Sulphasalazine, Ankylosing spondylitis, Immunoglobulin A, Immunoglobulin A-
1anti-trypsin complex, Controlled trial
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